Answer:
(-4r) + 10
Explanation:
Like terms are terms that have the same variable.
Terms are numbers separated by additions/subtraction.
2 + 1 + (-4r) + 7 Here, we have four terms.
Three are like terms: 2, 1, 7
They have the same variable, or no variable.
"-4r" is the only term by itself.
Combine the like terms.
2 + 1 + 7 = 10
Rewrite with the term that's by itself.
(-4r) + 10
The expression can be rearranged:
10 - 4r